Box-strapping machine



July 24, 1928.

P. WRIGHT BOX STRAPPING MACHINE Filed July 25, 1924 '6 Sheets-Sheet 1 Paw 677,775 71/23;

July 24, 1928.

P. WRIGHT BOX STRAPPING MACHINE Filed July 23, 1924 6 Shuts-Sheet 2 mmm E PcuWjW/WT' 7252,

July 24, 1928. 1,677,911

P. WRIGHT BOX STRAPPING MACHINE 6 Sheets-Sheet 3 Filed July 25, 1924 Iiil I! III July 24, 1928. 1,677,911

P. WRIGHT BOX STRAPPING MACHINE Filed July 25, 1.924 6 Sheets-Sheet 4 gvwentoz Pam 0'22 July 24, 1928.

P. WRIGHT BOX STRAPPING MACHINE Filed July 25, 1924 6 Sheets-Sheet 5 gwuwnl oz July 24, 1928. 1,677,911

P. WRIGHT Box sTRAPIfING MACHINE Filed July 25, 1924 6 Shuts-'Sheet 6 gwwntoz Par in Wh,

Patented July 24, 1928.

NITED STATES rnnvm warcn'r, or cnrcaeo, rumors.

BOX-STBAPPING MACHINE.

Application filed July 23, 1924. Serial No. 727,771.

This invention relates to wire tying or strapping machines and has for its object to provide a machine of this character which will be comparatively inexpensive to manufacture and more eificient in action than those heretofore proposed.

With these and other objects in view the invention consists in the novel details of coustruction and combinations of parts more 1c fully hereinafter disclosed and particularly pointed out in the claims.

Referring to the accompanying drawings forming a part of this specification in which like numerals designate like parts in all the 15 views;

Figure 1 is a plan view partly in section of a machine made in accordance with this invention;

Figure 2 is a front elevational view par- 2o tially broken away of the parts shown 1211 Figure 1;

Figure 3 is an end elevational view of the parts shown in Figure 1;

Figure 1 is a view similar to Figure 3 par 25 tially in section and showing the parts in a different position;

Figure 5 is a sectional view taken on the line 55 of Figure 2 looking in the direction of the arrows;

Figure 6 is a sectional view taken on the line 6-6 of Figure 2 looking in the direction of the arrows with certain of the parts omitted;

Figure 7 is a sectional view taken on the line 77 of Figure 2 looking in the direction of the arrows;

Figure 8 is a sectional view taken on the line 88 of Figure 1 looking in the direction of the arrows;

Figure 9 is a side elevational view partially in section of the tensioning mechanism;

Figure is a plan view partially in section of the part shown in Figure9;

Figure 11 is a perspective view of the cutter mechanism and its associated parts; and

Figure 12 is an enlarged sectional plan view of the twisting gear and its associated parts.

1 indicates any suitable framework provided with a smooth bottom 2, adapted to rest on and to move over the surface 50 of the object'to be wired, and also provided with a forward extension 3 having a tapered in- 55 clined surface 4 and a rearward extension 5 all as will be clear from the drawings.

Mounted for rotation in the frame 1 is the mam operating shaft 6 provided with the operatlng handle 7 and on the shaft 6 is rigidly mounted the main driving gear 8 meshing with the intermediate gear 9 mounted on the shaft 10 while 11 indicates a twisting pinion meshing with the gear 9 and provided with a slot 12 as shown. On each side of the twisting pinion 11 there are disposed slotted plate members 13 and 14 as best shown in Figures 2, 4, 11 and 12. Pivoted to the frame 1 as at 15 is a latch 16, and mounted in said frame 1 as at 17, Figure 1, is a horizontally disposed shaft. 18 provided with a slot 19 for a purpose to be disclosed below. A lever like handle 20 provided with a spring pawl 21 taking in a ratchet 22 rigid with shaft 18 is also provided as will be clearly understood from Figures 1, 9 and 10.

The main operating shaft 6 is extended toward the right of the main gear 8, as seen in Figure 1, and mounted on the extreme end 24 of said shaft 6 is the cam 25 adapted to actuate. the lever 27 pivoted at 28 to a portion 29 of the main frame 1. The left hand end of said lever 27, as seen in Figure 11, is provided with the slot 30 in-which is located the pin 31 carried by the vertically reciprocating cutter member 32 provided with the cutting portion or edge 33 as shown. Said cutting portion 33 forms one of a pair of shears while the flat face or lower edge 35 of the slotted member 13 forms the other member of the shears. In other words, as the cam 25 revolves with the shaft 6 the pin 31 together with the cutting member 32 is moved up and down against the face of the" slotted member 13, and the cuttin edge 33 of the cutter 32 coacts with the e ge 35 of the slotted member 13 to sever a wire lo- I ing handle 7 fits into the larger member 45' I rigid'with the shaft 6 and provided with the hub-like member 46 carrying the lug or stop 17 adapted to be turned through an arc of 180, and to' strike against an adjustable stop member 48 as best shown in Figure 4 of the drawings. Said stop or pin 48 is spring controlled as illustrated in Figure 4 and has rigidly attached thereto the piston member 49 so that when the lug 47 contacts with the pin 48 it marks the limit of throw of the lever 7 in a forward direction and at the same time it constitutes a cushioning stop for said lever. Said lever 7 is also asso ciatedwith another stop or lug 100, see Figures 1 and 3, which takes against the adjustable screw stop 101, when the lever 7 is thrown in a backward direction.

In order to facilitate the disengagement of the machine from the wire, there is provided a lever 62 pivoted as at 63 and having a claw 64 adapted to take into the surface 50 of the box. This lever accordingly can be pushed bodily toward the right as seen in Figure 7, whereupon claw 64 will engage the box and cause the machine to be pulled bodily toward the right as seen in said figure and thus disengage the wire from the machine. But again if when the lever 62 is to be moved the operator has forgotten to unclamp the end 56 of the wire from the dog 39, the machine will still be firmly attached to the wire and will not be readily disengaged therefrom. In order to prevent the operator from forgetting to unclamp bight 56 of the wire, there is pivoted to lever 62 as at the point 65, the reciprocating bent member 66 which passes under the lug or roll 67, see Figure 7, and to one side of the roll 68. slidable member 69, see Figure 1, and to said member 69 is pivoted as at 70 the link 71 pivoted as at 72 to the crank 7 3 rigid with the shaft 37 which is rigid-with the dog actuating lever 36 all as will be clear from Figures 7 and 8.

The parts are so connected that when the lever 38 is in its unclamping or extreme left hand position shown in Figure 1, the roll 68 has been moved a considerable distance from the bent portion 75 of the member 66, and said member 66 can freely reciprocate to the right and left as seen in Figure 7 upon the reciprocation of lever 62. On the other hand, when the lever 36 is moved to its clamping position or is thrown to the right as seen in Figure 1, then the roll 68 will contact with the bent portion 75 of the member 66, and said member 66 cannot be reciprocated. Therefore should the operator attempt to move the lever 62 to disengage the machine from the wire before moving the lever 36 to its unclamping position, he would find that the lever 62 could not be moved and thus he would be notified that he had forgotten to unclamp the end 56 of the wire.

From the foregoing, the operation of this machine will be clear but it may be briefly The roll 68 is carried by the summarized as follows: When a package such as a box is to be banded or bound with wire, the machine is placed upon the top surface 50 of said box so that-its smooth bottom 2 may move with freedom over said surface. One end of the wire (best shown in Figure 12) is next threaded into the slots 51, 12 and 53, and is clamped between the serrated edge 41 and the anvil 42. by turning the lever 36 and the cam 37 so as to depress the dog 39. But it is obvious that any other holding means may be provided for the extreme end or bight 56 of the wire. The slack of the wire is next passed around the box from the right hand portion thereof down along the vertical right side of the box underneath the bottom thereof and up on the left hand side of the box, underneath the latch 16 of the machine. The bight which we will now call 55, Fig. 12, is passed also into the slots 51, 12 and 53 so that the two bi hts 55 and 56 will .find themselves in a su stantially parallel relation, with the space between the said bights occupying the center of the twisting pinion 11. The bight 55 is next passed into the slot 19 of the tensioning device 22 and bent around the shaft 18, whereupon the tensioning lever 20 is operated until the desired tension is produced in the wire. It is a comparatively easy matter to so tension the wire that the latter will dig into or bite into the edges of the box and thus will said edges hold the wire in place when the box shrinks. After the desired tension has been thus produced on the wire, the main operating lever 7 is quickly thrown from the full line position shown in Figure 4, whereupon the stop 47 associated with said lever takes against the cushioning stop 48 and thus limits the forward throw of said lever 7. This limiting action of the lever 7 performs two functions. In one case, it enables the operator to pay no attention to the length of the throw and thus he saves time, andin the other case, since the lever stops at the same point each time, the parts can be easily adjusted so that the slot 12 of the twisting pinion 11 will be stopped in register with the stationary slots 51 and 53 and thus will the twisted wire be the more easily removed from the machine. In the same way, when the lever is returned to its full line position shown in Fig. 1, the stop 100 takes against the adjustable stop 101 so that the slot 12 of the pinion 11 is again brought into register with the slots 51 and 53 and therefore the introduction of the bights 55 and 56 into said slots is rendered more easy.

The cam 25 on the shaft 6 (se Figs. 7 and 11) is preferably so adjusted that when the lever is about to reach the limitof its extreme forward throw, said cam will accutter bar 32 is vertically reciprocated be-' tween its guides illustrated in Fig. 7 and its cutting edge 33 co-acts with the euttingedge 35 of the slot 53, all as will be clearfrom Figs. 11 and 12 of the drawings. In order to prevent the cutter bar 32 from severing the bight 56 of the wire, the lower edge of said cutter bar 32 is cut away to form the' shoulder 60 (see Fig. 11) and therefore only the outer bight 55 of the wire is severed during the cutting action.

After the knot in the wire is thus tied,

as by twisting together the two bights 55 and 56, it is sometimes-troublesome to disengage the machine from the twisted wire because a considerable tension has been placed upon the wire, and the wire being embedded in the corners of the box, should it jam in the slots 51, 12 or 53, the machine would be securely fastened to the box through this jamming action. In order to facilitate the removal of the machine from the twisted wire, the lever 62 and its associated parts are provided, to the end that the claw 64 of said lever bites into the box upon the operation of the lever 62 and thus is the machine forcibly moved to the rear and the wire disengaged from the machine. However, before this can take place, the end 56 of the wire must be freed from the serrated edge 41, and therefore the connections with the lever 62 are so arranged that said lever cannot be operated until said serrated edge 41 is disengaged from the end or bight 56 of the wire. Further, the hook member 16 would hold the wire firmly in the slots above mentioned unless prevented and therefore in order to automatically release said hook from the wire, the hub 46 associated with the lever 7 is provided with the lug 105 (see Figs. -1 and 2) which lug takes against the coacting lug 106 on the latch 16 .sioning operation.

(see Figs. 2 and 3) and lifts the latch 16 from the position shown in Fig. 3 to the position shown in Fig. 4 when the lever 7 completes its stroke as illustrated in said last named Fig. 4.

The sloping surface 4 with which the extension 3 1s provided facilitates the guiding of the wire into the slots (above mentioned) and said extension '3 aids in steadying the machine when the lever 7 is thrown into its forward position. In the same way, the extension 5 of the machine aids in steadying the same when the lever 7 is thrown into its rearward position illustrated in Fig. 3.

While the wire is being tensioned a very considerable amount of slack is taken up and therefore it is necessary for the machine to crawl over or move over the surface of I the box in adjusting itself during this tenof the machine facilitates this necessary .movement over'the box surface 50.

It is obvious that those skilled in the art may vary the details of construction as well as the arrangements of parts without departing from the spirit of the invention and therefore I do not wish to be limited by the above disclosure except as by the claims.

What is claimed is:

1. In a wire tying machine the combination of means for twisting two portions of a wire together after it' has been trained around a boxand package engaging means to aid in forclbly moving the machine away from said twisted portions.

2. In a wire tying machine, the combination of means for twisting two portions of a wire to ether after it has been trained around a ox, a latch for holding the wire 'in engaement with said twisting means,

means or rotating said twisting means, means on'said means for rotating said twisting means for releasing said latch after the twisting o eration and box engaging means to aid in orcibly moving the machine away from the twisted portions.

In testimony whereof I aflix my signature. PARVIN WRIGHT.

The smooth bottom 2. 

